Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M
CVE-2026-52823Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes
Medium 5.3
In plain English
A medium-severity cross-site request forgery in kimai from kimai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Kimai is an open-source time tracking application. Prior to 2.58.0, TimesheetController exposes GET /api/timesheets/{id}/stop and GET /api/timesheets/{id}/restart, which reuse an authenticated browser session and perform state-changing operations through GET requests without a request-forgery defense. A remote attacker can cause a logged-in user to request either route from attacker-controlled content, stopping a running timesheet or restarting a historical entry to create and start a new timesheet without the user's consent. The unauthorized changes can corrupt time records, billing, reports, approvals, and audits. This issue is fixed in version 2.58.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | kimai/kimai | 2.58.0 | GHSA-r8vr-m544-qh4h |
Affected products (as reported)
Weakness: CWE-352 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h x_refsource_CONFIRM
- https://github.com/kimai/kimai/pull/5952 x_refsource_MISC
- https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601 x_refsource_MISC
- https://github.com/kimai/kimai/releases/tag/2.58.0 x_refsource_MISC
- https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h x_refsource_MISC